Category Archives: R

Statistics and Relational Database Management Systems (RDBMS)

In this new era of science, the word ‘Statistics’ has a fascinating sense of hidden insights and analytics, data modelling, mining, learning from features, all about huge data management approaches by analyzing, interpreting, representing by figures and predicting for next decades and so on. World is hunting for big data analysts, world is getting hunger for researchers, data scientists and statisticians.

Continue reading Statistics and Relational Database Management Systems (RDBMS)

Graphics using R

R is a free software for statistical analysis and graphics. It has become widely popular among statisticians as well as people from other disciplines. It is a free software, and can be downloaded from here.  There are various functions in R to construct graphs. Moreover, graphs are more flexible way to visualize information extracting from data.    In light of this situation, the aim of this article is to give some ideas on producing graphs using R. Hope this will be helpful for R learners. Continue reading Graphics using R

Poisson approximation of binomial probabilities

This is yet another experiment to see how good is the approximation of binomial probability when we use Poisson and normal distributions for scenarios with large n, and p close to zero or one.

Consider a problem where the random variable X follows a binomial distribution with a known probability of success p, and number of trials n. If n becomes large, it may not be possible to calculate the probabilities by hand calculation or using a calculator.

Continue reading Poisson approximation of binomial probabilities

Export a Table Created by R to a TeX File

Producing tables in LaTeX might be a difficult task as we can not just copy and paste a table in the editor; we have to write all the numbers and other codes. But with the help of xtable package of R it is possible to produce all the necessary codes for producing table in LaTeX and also possible to export the codes in a tex file. Suppose we have produced summary statistics for Air Pollution Data and now want to export it to a tex file as a tabular format. Here are the codes-

Continue reading Export a Table Created by R to a TeX File